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PIC16LC554 数据表(PDF) 36 Page - Microchip Technology

部件名 PIC16LC554
功能描述  EPROM-Based 8-Bit CMOS Microcontroller
PDF  96 Pages
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制造商  MICROCHIP [Microchip Technology]
网页  http://www.microchip.com
标志 MICROCHIP - Microchip Technology

PIC16LC554 数据表(HTML) 36 Page - Microchip Technology

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PIC16C55X(A)
DS40143B-page 36
Preliminary
© 1997 Microchip Technology Inc.
7.1
Configuration Bits
The configuration bits can be programmed (read as '0')
or left unprogrammed (read as '1') to select various
device configurations. These bits are mapped in
program memory location 2007h.
The user will note that address 2007h is beyond
the user program memory space. In fact, it belongs
to the special
test/configuration
memory
space
(2000h – 3FFFh), which can be accessed only during
programming.
FIGURE 7-1:
CONFIGURATION WORD
CP1
CP01
CP1
CP01
CP1
CP01
—
Reserved CP1
CP01 PWRTE WDTE F0SC1 F0SC0
CONFIG
Address
REGISTER:
2007h
bit13
bit0
bit 13-8
CP<1:0>: Code protection bits(1)
5-4:
11
= Code protection off
10
= Upper half of program memory code protected
01
= Upper 3/4th of program memory code protected
00
= All memory is code protected
bit 7:
Unimplemented: Read as '1'
bit 6:
Reserved: Do not use
bit 3:
PWRTE: Power-up Timer Enable bit
1 = PWRT disabled
0 = PWRT enabled
bit 2:
WDTE: Watchdog Timer Enable bit
1 = WDT enabled
0 = WDT disabled
bit 1-0:
FOSC1:FOSC0: Oscillator Selection bits
11
= RC oscillator
10
= HS oscillator
01
= XT oscillator
00
= LP oscillator
Note 1: All of the CP1:CP0 pairs have to be given the same value to enable the code protection scheme listed.



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